November 2019 1 101 Report
Quiz Math - Trigonometri

Soal Nomor 1
Buktikan identitas trigonometri berikut.
 2 \sin A \cos (A + 30\degree) \\ = \sin(2A + 30\degree) - \dfrac12

Soal Nomor 2
Buktikan identitas trigonometri berikut.
 2 \cos \left(\dfrac{\pi}{4} + A\right) \cos \left(\dfrac{\pi}{4} + A \right) \\ = -1 +\sin 2A
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